motor HONDA CIVIC 1996 6.G Workshop Manual

Blower Unit
Replacement
NOTE: The blower motor, recirculation control motor
and blower resistor can bs replacsd without rsmoving
th€ blower unit (see neld Page).
1. Move the temperature control to "HOT."
'96-98: Slide the temperature control lever.'99-00: Turn the ignition switch ON (ll), then turn
the temperature contol knob. Turn the ignition
switch off,
Remove the glovs box (ses ssction 20),
R€move ths s6lf-tapping screw and ths passsng6r's
dashboard low€r cover. Removo the bolt, the nut
and the kn€e bolst€r, then remove the fiv€ bolts and
the glove box trame,
Without Air Condhioning
4-a. Remove the wiro harness from the h68t€r duct, then
remove the two self-tapping scrsws and the heatsr
duct.
KNEE
GLOVE BOX FRAME
HEATER DUCT
21-37
Wrth Air Conditioning
4-b. Removo th6 ev8porator (sss pago 22-28).
6x1.0m|n9.8 N'm
6x1.0mm9.8 N'm lt'o tgf'm, t.2 lb{'ttl
Disconnoct the connectors trom th€ blower motor,
blowor r6sistor {'96 - 98 models), power transiator
('99 - 0O modsls), blowor motor high telay ('99 - 00
models) and recirculation control motor.
R€mov€ ths wiro harnoss clip from tho recirculation
control motor, and release the wir6 harnsss from ths
clamo on the blowor unit. Remove the two mount-
ing bolts, tho mounting nut and ths blowor unit'
9.8 .m 11.0 tgfm,1.2 tblfrl
lnstall in ths reverso order of removal. Mako surs
that thsre is no air leaka96.
6x1.0mm9,t N'm 11.0lgi.m,7.2 tbf.fil

Blower Unit
Overhaul
NOTE:
RECIRCULATIONCONTROL MOTORTest, page 21-48
aBefore reassembly. make sure that the recirculation control door and linkage move smoothly without binding.
When attaching the recirculation control motor, make sure its positioning will not allow the recirculation control door
to be pulled too far.
After aftaching the recirculation control motor, connect power and ground, and watch the movement of the recircula-
tion control door.
BLOWERTest, page 2'l 9{'96 - 98 modebl
POWER TRANSISTOR l'99 - 00 modeblTest, page 21-50
Test, page 21'10 ('96 98 models) orpage 21'31 ('99 00 models)
m
MOTOR
2134

Heater Unit
Replacement (cont'dl
6.
7.
8.
9.
Remove the dashboard (see section 20).
Remove the heater duct (see page 21-37) or evapo-
rator (see page 22-28).
Disconnect the connectors from the mode control
motor and air mix control motor ('99 - 00 models),
then remove the wire harness clips and wire har-
ness from the heater unit. Remove the clip from the
heater duct, then remove the two mounting nuts
and the heater unit.
6x1.0mm9.8 N.m 11.0 kgl.m,7.2 lbf.ftl
HEATER UNIT
lnstall in the reverse order of removal. Make note of
the following items.
Apply sealant to the grommets.
Do not interchange the inlet and outlet heater
hoses. Make sure that the clamps are secure.
Refill the cooling system with engine coolant
(see section 10).
Connect all cables, and make sure they are prop-
erly adjusted (see page 21-44 (96 - 98 models)
or page 21-45 ('99 - 00 models)).
Make sure that there is no air leakage.
21-40

Air Mix Gontrol Motor
't.
Test -'99 - 00 Models
Disconnect the 5P connector from the air mix con-
trol motor.
Connect battery power to the No. 1 terminal of the
air mix control motor, and ground the No. 5 termi,
nal; the air mix control motor should run, and stop
at MAX HOT. lf it doesn't, reverse the connections;
the air mix control motor should run, and stop at
MAX COOL.
lf the air mix control motor does not run, remove
it, then check the air mix control linkage and
doors for smooth movement.
lf they move smoothly, replace the air mix con-
trol motor.
AIR MIX CONTROL MOTOR
Measure the resistance between the No.2 and No.3
terminals. lt should be approximately 4.8 to 7.2 kO.
Measure the resistance between the No. 2 and No. 4
terminals. lt should be approximately 3.84 to 5.76 kO
at MAX HOT and approximately 0.96 to 1.44 kO at
MAX COOL.
21-46
5P OONNECYOB
Replacement -'99 - 00 Models
1, Disconnect the 5P connector from the air mix con-
trol motor. Remove the self-tapping screws, the airmix control motor and the flange collar.
CONTROLMOTOR
Install in the reverse order of removal. After installa-
tion, make sure the air mix control motor runs
smoothly.

Mode Control Motor
2.
Test
1.
4.
Disconnect the 7P connector from the mode control
motor.
Connect battery power to the No, 1 terminal, and
ground the No.7 terminal,
CAUTION: Never connecl the battery in iho oppo-
site direction.
Using a jumper wire, connect the No. 7 terminal
individually to the No. 2,3, 4,5 and 6 terminals in
that order. Each time the connection is made, the
mode control motor should run smoothly and stop.
NOTE: lf the mode control motor does not run when
jumping the first terminal, jump that terminal again
after jumping the other terminals. The mode control
motor is OK if it runs when jumping the first termi-
nal again.
MODE CONTROL MOTOR
lf the mode control motor does not run in step 3,
remove it. then check the mode control linkage and
doors for smooth movement. lf they move smoothly,
reolace the mode control motor,
Replacement
1. Disconnect the 7P connector from the mode control
motor,
Remove the rod from the arm of the mode control
motor.
Remove the tyvo self-tapping screws and the mode
control motor.
lnstall in the reverse order of removal. After installa'
tion, make sure the mode control motor runs
smoothly.
7P CONNECTOR
21-47

Recirculation Control Motor
Test
LDisconnect the 4P connector from the recirculation
control motor.
Connect battery power to the No. I terminal, andground the No.2 and No. 4 terminals; the recircula-
tion control motor should run smoothly.
CAUTION: Never connest ths battery in the oppo-
site direction.
Disconnect the No. 2 or No. 4 terminals from ground;
the recirculation control motor should stop at FRESH
or RECIRCULATE.
NOTE: Don't cycle the recirculation control motor
for a long time.
RECIRCULATION CONTROL MOTOR
4. lf the recirculation control motor does not run in step
2, remove it, then check the recirculation control link-
age and door for smooth movement. lf they move
smoothly, replace the recirculation control motor.
21-48
Replacement
L Disconnect the 4P connector from the recirculation
control motor, and remove the wire harness clip
from it.
Remove the two self-tapping screws and the recir-
culation control motor.
Install in the reverse order of removal. After installa,
tion, make sure the recirculation control motor runs
smoothly.
4P CONNECTOR
CONTROL MOTOR

RelaysHeater Fan Switch
Test
There should be continuity between the No 1 and No. 3
terminals when power and ground are connected to the
No.2 and No. 4 terminals, and there should be no conta-
nuity when power is disconnected.
Blower motor relaY
. Blower motor high relay ('99 00 models)
,I It;€'Y )
Test -'96 - 98 Models
Check for continuity between the terminals according to
the table below.
lerminal
Position14253
OFF
1IrJ
2o-o
3o-a
4c)-{
21-49

Mode Control SwitchPower Transistor
Test -'96 - 98 Models
Check for continuity between the terminals accordinq tothe table below.
Terminal
Position't071
Heato-o
HeaVDefo---o
Defo--o
VentG-o
HeaVVento--o
1
;l t
4
789
21-50
Test -'99 - 00 Models
1. Disconnsct the 3P connector from the oower tran-stsror.
2, Carefully release the lock tab on the No. 2 terminal inthe 3P connector, then remove the terminal and insu-late it from body glound.
Connect a 1.2 - 3.4 W bulb between the No. 1 andthe No. 2 cavity on the 3P connector.
Reconnect the 3P connector to the power translstor.
Turn the ignition switch ON fll), and check that theblower motor runs.
12V 1.2-3,1W
No. 1 laLU/aLK)

Circuit Diagram
UNDER DASHFUSE/RELAY 8OX
N0.17 (7.54)
'96 - 98 Models
UNDER.HOOD FUSEi BELAY BOX
WHT/SLU BLKYEL
BLK
+
G751
3
'o
I8LK
I
G40lG402
GNITON SWITCH
N0.41 (8rA) N0.42 (40A)
COMPBESSORCLUTCHBELAY
BLUMHT
,l
(E) i,T'
BLUi BED
A/c ITHERMOSTAI BLU/REO
CONDENSEFFAN MOTOR
*F,.X,
FAN rl
BLK
{
G401G402
HEATERswrlcH
32
22-6

Troubleshooting
Condenser Fan (cont'd)
CONDENSER FAN RELAY 4P SOCKET
CONDENSEB FAN 2P CONNECTORWire side of female terminals
-=F_
l!.lI slx
@I
Check tor an opon in the wi.o:1. Disconnect the jumper wire.2. oisconnect the condenser tan2P connector.3. Check for continuity betweenthe No. 1 terminal of the con-denser fan relay 4P socket andthe No. 1 terminal of the con-denser fan 2P connector.
Rapair op6n in the wirs bgtwconthe condcnsor tan rclay and thecondgnlar fan.
ls there continuity?
Check to. en open in the wire:Check for continuity between theNo. 2 terminal ot the condenserfan 2P connector and bodyground.
Check Ior rn opon in th6 wirebctwoen the condcnser tan andbody ground, lf iho wirc ii OK,chcck for poor ground at G751.
ls there continuity?
Replaco the condense. fan motor.
22-10